Filter



FIG. 1 is a top perspective view of a filter, with a center portion broken by jagged broken lines to indicate indeterminate length;

FIG. 2 is a top plan view of the filter shown in FIG. 1;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. The dashed broken lines in the drawings are for purpose of illustrating environmental structure and form no part of the claimed design. The appearance of the center portion of the drawings between the dot-dash break lines in FIGS. 1-3 and 6-7 forms no part of the claimed design. The filter is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a filter, as shown and described. 